wan, a popular singer in china. he says he called her from his office every night. one of the photos shows a young xi riding a bike with his daughter on the backseat. the daughter is now studying at a u.s. university. in another photo, he is seen pushing the wheelchair of his father, the former vice premier. it's unusual for the chinese media to report on the private aspects of the country's leaders. >> populous, prosperous, pushing ahead, china's rise, wealth, power, and problems, an income gap divides people. pollution threatens their health and disputes at sea strain relations with its neighbors. find out about the challenges china faces on "newsline."